/**
 * 身份证校验算法
 */
function SFID(card) {

    var vcity={ 11:"北京",12:"天津",13:"河北",14:"山西",15:"内蒙古",
        21:"辽宁",22:"吉林",23:"黑龙江",31:"上海",32:"江苏",
        33:"浙江",34:"安徽",35:"福建",36:"江西",37:"山东",41:"河南",
        42:"湖北",43:"湖南",44:"广东",45:"广西",46:"海南",50:"重庆",
        51:"四川",52:"贵州",53:"云南",54:"西藏",61:"陕西",62:"甘肃",
        63:"青海",64:"宁夏",65:"新疆",71:"台湾",81:"香港",82:"澳门",91:"国外"
    };
    //检查号码是否符合规范，包括长度，类型
    var isCardNo = function(card)
    {
        //身份证号码为15位或者18位，15位时全为数字，18位前17位为数字，最后一位是校验位，可能为数字或字符X
        var reg = /(^\d{15}$)|(^\d{17}(\d|X)$)/;
        if(reg.test(card) === false)
        {
            return false;
        }
        return true;
    };
    //取身份证前两位,校验省份
    var checkProvince = function(card)
    {
        var province = card.substr(0,2);
        if(vcity[province] == undefined)
        {
            return false;
        }
        return true;
    };
    //检查生日是否正确
    var checkBirthday = function(card)
    {
        var len = card.length;
        //身份证15位时，次序为省（3位）市（3位）年（2位）月（2位）日（2位）校验位（3位），皆为数字
        if(len == '15')
        {
            var re_fifteen = /^(\d{6})(\d{2})(\d{2})(\d{2})(\d{3})$/;
            var arr_data = card.match(re_fifteen);
            var year = arr_data[2];
            var month = arr_data[3];
            var day = arr_data[4];
            var birthday = new Date('19'+year+'/'+month+'/'+day);
            return verifyBirthday('19'+year,month,day,birthday);
        }
        //身份证18位时，次序为省（3位）市（3位）年（4位）月（2位）日（2位）校验位（4位），校验位末尾可能为X
        if(len == '18')
        {
            var re_eighteen = /^(\d{6})(\d{4})(\d{2})(\d{2})(\d{3})([0-9]|X)$/;
            var arr_data = card.match(re_eighteen);
            var year = arr_data[2];
            var month = arr_data[3];
            var day = arr_data[4];
            var birthday = new Date(year+'/'+month+'/'+day);
            return verifyBirthday(year,month,day,birthday);
        }
        return false;
    };
    //校验日期
    var verifyBirthday = function(year,month,day,birthday)
    {
        var now = new Date();
        var now_year = now.getFullYear();
        //年月日是否合理
        if(birthday.getFullYear() == year && (birthday.getMonth() + 1) == month && birthday.getDate() == day)
        {
            //判断年份的范围（3岁到100岁之间)
            var time = now_year - year;
            if(time >= 3 && time <= 100)
            {
                return true;
            }
            return false;
        }
        return false;
    };
    //校验位的检测
    var checkParity = function(card)
    {
        //15位转18位
        card = changeFivteenToEighteen(card);
        var len = card.length;
        if(len == '18')
        {
            var arrInt = new Array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2);
            var arrCh = new Array('1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2');
            var cardTemp = 0, i, valnum;
            for(i = 0; i < 17; i ++)
            {
                cardTemp += card.substr(i, 1) * arrInt[i];
            }
            valnum = arrCh[cardTemp % 11];
            if (valnum == card.substr(17, 1))
            {
                return true;
            }
            return false;
        }
        return false;
    };
    //15位转18位身份证号
    var changeFivteenToEighteen = function(card)
    {
        if(card.length == '15')
        {
            var arrInt = new Array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2);
            var arrCh = new Array('1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2');
            var cardTemp = 0, i;
            card = card.substr(0, 6) + '19' + card.substr(6, card.length - 6);
            for(i = 0; i < 17; i ++)
            {
                cardTemp += card.substr(i, 1) * arrInt[i];
            }
            card += arrCh[cardTemp % 11];
            return card;
        }
        return card;
    };

    //是否为空
    if(card === '')
    {
        // mui.alert('请输入身份证号，身份证号不能为空');
        return false;
    }
    //校验长度，类型
    if(isCardNo(card) === false)
    {
        //  mui.alert('您输入的身份证号码不正确，请重新输入');
        return false;
    }
    //检查省份
    if(checkProvince(card) === false)
    {
        //  mui.alert('您输入的身份证号码不正确,请重新输入');
        return false;
    }
    //校验生日
    if(checkBirthday(card) === false)
    {
        //  mui.alert('您输入的身份证号码生日不正确,请重新输入');
        return false;
    }
    //检验位的检测
    if(checkParity(card) === false)
    {
        //  mui.alert('您的身份证校验位不正确,请重新输入');
        return false;
    }
    //    console.info("OK");
    return true;
};